Safety mechanism for elevator-shaft doors



Apr. 24, 1923. 7 1,453,073

G. G. LAUREYNS SAFETY MECHANISM FOR ELEVATOR SHAFT DOORS Filed Dc. 1919 8 Sheets-Sheet 1 Apr. 24, 1923.

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Apr. 24,1923. 1,453,073

G. G. LAUREYNS SAFETY MECHANISM FOR ELEVATOR SHAFT DOORS Filed Dec. 5, 1919 s ShetsSheet 5 //9 Z g anve-nto c M wadw,

Apr. 24, 1923.

G. G. LAUREYNS I SAFETY MECHANISM FOR ELEV ATOR SHAFT DOORS Filed Dec. 5, 1919 a Sheets-Sheet 'r 0 ma H M ...n v a a Z m Apr. 24, I923. G. G. LAURE YNS SAFETY MECHANISM FOR ELEVATOR SHAFT DOORS 1919 8 Sheets-Sheet 8 Filed Dec. 5

Patented Apr. 24, 1923.

YATES rarer SAFETY MECHANISM FOR ELEVATOR-SHAFT DOORS.

Application filed December 3, 1919. Serial No. 342,240.

To all whom it may concern: I

Be it known that I, GUs'rAvE G. LAU- nYNs, a citizen of the United States, and a resident of Newark, in the county of Essex andState of New Jersey, have invented certain new and useful Improvements in Safety Mechanisms for Elevator-Shaft Doors, of which the following is a specification.

The invention pertains to safety-mechanisms for elevator-shaft doors, and it resides; in novel features and combinations of parts hereinafter described, and particularly pointed out in 'the claims.

My invention possesses many features of novelty of construction and method of operation, and said invention has been produced with the view of providing reliable means whereby the accidents, too numerous to require mention, arising from elevator shaft doors being open or capable of being opened when an elevator car is in motion or not at the floor of the building at which the door may be located, may be effectually prevented. I may carry out my inventionby several different forms of mechanism, and preferably I provide a mechanism composed of three divisions or sets or sub-mechanisms, one being carried by the car, another mounted in the elevator shaft at the floor of the building and the third being connected with the elevator shaft-door, and these three divisions or mechanisms are capable of such cooperation that the elevator shaft door cannot be opened, except when the elevator car arrives at the floor of the building at which the door may be located and cannot then be opened; until the operator on the car cuts off the motive power therefrom and sets the mechanism, embraced in my invention, for freeing the elevator shaft door and interlocking the mechanism mounted in the elevator shaft with that carried by the car, so that at such time the elevator car becomes locked in stationary position and it is safe to open and close, the shaft door. The mechanisms of my invention also socooperate that the elevator shaft door must be; closed and locked after having been opened, before the elevator-car can start in motion.

Since my invention may be embodied in a number of different forms of mechanism and rendered applicable to horizontally sliding doors, vertically sliding doors and rolling or shutter doors, it will be inexpedient for, me to attempt to define; ll a. brief. way, the details of construction presented herein as embodiments of my invention. These details will, however, be hereinafter fully described. I maysay, however, that in carrying out my invention I supply not only new mechanisms in their construction and methods of operation, but utilize magnetic force as means for unlat-ching the elevator shaft door so that it may be opened and for locking the elevator car in stationary position at the several floors of a building when the doors thereat are to be opened. I may provide the magnetic force utilized in carrying out my. in vention either by means of electro-magnets or permanent magnets, and in either event I will preferably so locate the electro-ma-gnets or position the permanent magnets that their operation becomes substantially simultaneous with the cutting off of power from the car when the car is brought to rest. I regard my invention as broadly new and seek adequate protection for the same. My invention is not,; therefore, limited to details of form, construction and arrangement, otherwise than the scope of the appended claims may require, and it will. appear obvious from the following description that my invention may be embodied in various forms of mechanisms embracing the broad principles of my invention.

H In locking the car, as I express it, I preferably do this by locking the motive controldevices on the car, but I may otherwise lock a car of some varieties.

The invention will be fully understood from the detailed description hereinafter presented, reference being had to the accompanying drawings, in which:

Fig. l is avertical section through a portion of the elevator shaft of a building and an elevator car, which is indicated as arrested at one of the floors of the building. theelevator shaft door being closed and the operativemechanism embodying my invention beingshown in normal position ready for operation;

Fig. 2 is a horizontal section through the same, taken on the dotted line 2-2 of Fig. 1; 1

.3 is a vertical section, on a larger scale, through a portion of the same, taken on the dotted line 3-3 of Fig. 2 and illustrating the mechanism of my invention in position and in normal inoperated condition;

Fig. else diagrammatic view illustrating certain features of the mechanism, with the electric circuit and mechanical features for causing the circuit to energize the electro magnets;

Fig. 5 is a detached face view on a larger scale of that portion of my mechanism which is suspended from the elevator-shaft door and also that portion of the mechanism which cooperates therewith and is secured to the side of the elevator shaft, the parts being shown in their normal inoperated position and relation;

6 is a sectional view of the same, taken on the dotted line 6-6 of Fig. 5, and including, at the lower portion of Fig. 6, a plan representation of the mechanism car ried by the car for cooperation with the mechanism shown in Fig. 5;

Fig. 7 is a view corresponding with 5, but showing the parts in the relation they assume when the elevator-shaft door has been partly opened;

Fig. 8 is a horizontal section through the same, taken on the dotted line 88 of Fig. 7, and illustrating, at the lower portion of Fig. 8, the mechanism carried by the car and in the position the same assumes when the sliding door is in its partly or wholly opened position, said mechanism then locking the operating lever on the car against movement so as to prevent the car from be ing started until the door has been again closed;

9 illustrates the mechanism of my invention embraced with a modified construction of the part thereof carried by the car, the mechanism secured to the elevator shaft and door shown at the top of Fig. 9 being the same as that illustrated at the top of Figs. 6 and 8, and the mechanism below the same, being that carried by the car, embodying electrical means for cutting off the power from the car when the car has come to rest at a floor of the building and the door has been started on its opening movement; the switch mechanism shown in Fig. 9 is partly in section and the electric circuit in which the same is embraced and the control mechanism on the car being indicated in diagram;

Fig. 10 is a vertical section through the same, taken on the dotted line 1010 of Fig. 9. but illustrating the electric switch mechanism in its inoperated position. with the electric power on the car;

Fig. 11 is a horizontal section through a dum-waiter shaft and the door therefor. the hoist being shown in top elevation and the whole equipped with the one embodiment of my invention;

Fig. 12 is an en arged horizontal section through a portion of the same;

illustrates further modification of my invention. considered in its broader sense, and therein is represented an elevation of a pair of counter-balance doors equipped with mechanism embracing one embodiment of my invention, the elevation having been taken from the shaft side of the doors;

Fig. 14: is a horizontal section, on a larger scale, through a portion of the same and especially the mechanisms carried by the car and door, with certain parts mounted on the elevator shaft, the sect-ion being on the dotted line l41& of Fig. 15, with all the parts in their normal inoperated relation and the doors in closed position;

Fig. 15 is a horizontal section through latched in closed posit-ion, the section being i on the dotted line 17-17 of Fig. 18;

Fig. 18 is a horizontal section through the same, taken on the dotted line 18-18 of Fig. 17;

Fig. 19 is a detailed view, partly broken away, of a portion of the mechanism mounted in the shaft and on the door, respectively, F 19 presenting an elevation looking toward the right at the right hand inner portion of Fig. 18;

Fig. 20 is a sectional view through a detail portion of the mechanism carried by the car, taken on the dot-ted line 2020 of Fig. 17 and illustrating the presence of a cam for use in emergencies in freeing the mechanism mounted in the shaft from that carried by the car;

Fig. 21 illustrates the application of the mechanism of my invention to the lower inner corner of one of a pair of sliding doors. as distinguished from equipping a single sliding door with said mechanism. as shown in Figs. 1 and 2;

Fig. 22 is an elevation illustrating the application of the mechanism of my invem tion to the upper inner corner of one of a pair of sliding doors. the mechanisms in Figs. 21 and 22 being substantially the same. except as to their location, with relation to the doors, and

Fig. 23 is a perspective view indicating the application of my invention to a flex iblc door of the rolling type.

In the drawings. referring to Figs. 1 to 8 inclusive. 3() designates a part of the building, 31 an elevator shaftformed therein, 32

one of, the floors of the building, 33 a doorway leading from said floor to said shaft, 34 a sliding door provided for the opening and closing of said door-way, and 35 an elevator car of any suitable construction having a flooring 36 to be brought into horizontal line with the several floors of the building, as is customary, so that passengers may, when the door 34 is open, either leave the car and pass upon the flooring 32 or enter the car from said flooring. The elevator shaft car 35 and door 34, except for the features of my invention, may be of any suitable or usual construction. The building will have as many floors as may be necessary and at present I diagrammatically indicate a sliding door 34 to be slid behind a panel 37, as usual.

The features of my invention, illnst-ated in Figs. 1 to 8 inclusive, comprise three sets of mechanism, one set being secured to the flooring 36 of the car and shown in detail in Figspl, 3, 4, 6 and 8, another set being secured to the door 34 and illustrated more clearly in Figs. 5 to 8 inclusive and the remaining set being secured in the elevator shaft adjacent to the floor 32 and shown more clearly in Figs. 5 to 8 inclusive.

The mechanism connected with the car comprises a metallic frame 38, preferably of horseshoe outline fastened to a block 39 which may be secured to the bottom of the flooring 36 of the car by any suitable means, and said frame 38 at the ends of its leg portions enter and constitute cores for electromagnets 40 of usual formation. The legs of the frame 38 project toward the adjacent wall of the elevator shaft and, by preference,

the electro-magnets 40 are adjacent to the vertical plane of the front of the car Extending between and journalled in the legs of the frame 38, is a vertical shaft- 41 (Fig. 3), upon which are mounted pulleywheels 42, 43, a cam 44 and a rotary lock and switch-member-45. The pulley-wheel 42 and rotary lock and switch-member are secured together and have corresponding rotary movement, and the pulley-wheel 43 and cam 44 are secured together and have corresponding rotary movement.

The rotary lock and switclnmembcr 45 preferably of disk outline and at one edge is formed with a recess 46 having right an gnlar edge walls adapted to cooperate with a locking member, the same being, in the present instance, an armature connected with the wall of the elevator shaft. The member 45 at its edge opposite to the recess 46 is formed with a recess 47 in which is located an insulating strip 48 which is recessed out at 49 to receive and expose a conductor strip50. The frame 38 opposite to the switch and lock ing member 45 has a block of insulating material 51 securedto it, and upon said block 51 are secured contact springs 52, respecti'rely, to which are led the'eleetric current conductors 54, 55, respectively, extending from'any suitable source of current. The contact springs 52, 53 are adapted to engage the periphery of the insulating strip 4'7 as the member 45 is rotated from one position I the car. lVhen the lever 57 is moved in one direction, it will, through the cable 56 and 1.1

pulley-wheel 42, rotate the combined switch and locking member 45 in one direction, and when said control device 57 is moved in a re verse direction it will, through said cable 56,

rotate the pulley-wheel 42 and said member 45 in a reverse direction, and when said control device 5? is moved to a neutral position, as shown in Fig. 1, to stop the car at the floor of the building, the member 45 will, through the cable 56 and pulley-wheel 42, be moved to a neutral but operative position, being that shown in F ig. 8.

On the bottom of the car will be arranged a suitable battery and circuits for energizing the electro-magnets 40, as I diagrammzitically illustrate in Fig. 4, in which 58 indicates a battery, a circuit wire leading thereto from the spring contact 52. and a circuit wire leading from said battery to the electro-magnets and thence to the other spring contact numbered 53. The rotary member 45 is not in the electric circuit which includes the electro-magnets 40, but carries the conducting plate 50 located at about the middle portion of the length of the insulation material 48 and adapted to connect the spring contacts 52, 53, in the manner indicated in Fig. 4 so as to complete the circuit through the battery 58 and electro-magnets 40. hen the rotary member 45 is in the position shown in F ig. 4, having been turnedto that position by the control-lever 57, the circuit through the electro-magnets 40 will be completed and said magnets will become energized, the magnetic power generated by the magnets 40 then serving to actuate certain locking mechanism carried by the door 34 and other locking mechanism located in the shaft 31 so that a locking bar or armature 59 located in said shaft may be compell d to enter the recess 46 in. said member 45 and lock the car against movement in either direction. The bar or armature which looks the car door in closedposition I numher 160, ahdthecperatien of the features 59,

will be more fully referred to hereinafter.

The cam 44- mounted on the shaft 41 has a projecting portion 61 whose shape is indicated by dotted lines in 6 and 8, and this cam is connected with the pulley-wheel as which is connected by a. cable 62 with an operative lever 63 mounted in the car 35 and which lever is not to be utilized, except in case of emergency or on some special occasion when it is desired to, independently of the control lever 57, free the latch bar or armature 59 from the recess 46 of the member 45 or from the interlocking relation of said bar or armature 59 with said member 45, shown in Fig. 8, so that the car may be moved. When it is desired to utilize the cam a l in freeing the bar 59 from the recess 4:6 of the member 45, the operator in the car will, by turning the lever 63, rotate the pulley-wheel 4:3 and thereby turn the cam 44 to carry its projecting portion 61 against said bar 59, said projection 61, then serving to force the bar 59 outwardly from the recess 46 of the member 45 in opposition to the force exerted by the electroanagnets 40 to retain said bar within said recess.

The car 35 will be connected with the usual power operating means, subject. to the control of the lever 57, and such means constitute no portion of my present invention and therefore need not be illustrated in the drawings. I

Having described the features of my mechanism carried by the car, I will refer to the mechanism carried by the door 34, or such other door as may be provided, and this mechanism comprises a. supporting; bar 64: secured to the shaft side of the door and extending downwardly below the level of the flooring 32, said bar 64 being; a plain bar of adequate strength and having secured to it the hinges 65 one leaf 66 of which is fastened to the bar 6 by means of screws 67 (Fig. 7) and the other leaf 68 of which hinges extends horizontally and has secured upon its side facing the elevator shaft, a plate 69 and upon its other side, facing the adjacent wall of the shaft, plate 70 (Fig. 8), which has one arm 71 arranged to move against the bar 64: as a stop and at its outer end is secured to the latch bar 60. There are preferably two of the hinges 65 secured to the bar 64 each having leaves 66, 68 and each leaf 68 having plates 69 and 70, the outer ends of the plates 76 being; secured. to and carrying the latch-bar 60. The plates 69 extend at one side of the hinges 65 and the plates or arms 71. are disposed at the other side of said hinges, and said plates 69, 7]. serve as stops to limit. the movement of the latch-bar 69, but permit said bar to have an adequate movement to engage with and become disengaged from a ratchetshoulder 73 which constitutes a portion of the mechanism secured to the elevator shaft.

The devices connected with the shaft door :i-l comprise the bar 64: and the features hereinbefore referred to connected with said bar, these features being the hinges 65, plates 69, 7 and latch-bar 69, and preferably I will include in such mechanism a coiled spring 74- mounted on the pintle of the hinges 65 and adapted to turn the plates or bars 70 and latch-bar 60 in a direction toward the bar 75 secured in the elevator shaft and on which the shoulder73 is formed.

The mechanism secured in the shaft and intended to cooperate with the sets of mechanism carried by the car and by the shaftdoor, respectively, comprises a plate 76 which is secured to the wall of the elevator-shaft, or a part fastened thereto, by means of screws 77 (Figs. 5 to 8 inclusive), two plates or arms 78 connected by hinges 79 with said plate '76 and the armature or latch-bar 59 secured to the free ends of said plates or arms 78 which arms are adapted to have a hinged movement, by reason of the hinges so that the armature 0r latch-bar 59 may move toward or from the electro-magnets a9. The movement of the hinged plates or arms 78 may be limited. by screws 81 passthrougfh slots 82 in said plates or arms and entering the base-plate 76. The plate 76 may be formed integrally with the bar 75 whose edge outline is illustrated in Figs. 6 and 7. The only features secured to the shaft are the plate 76 and the hinged plates or arms 78, armature or latch-bar 59 and bar and the features of the mechanism secured in the shaft cooperate with both the ii'ieclianism carried by the door and that carried by the car. The bar 75 formed on or secured to the base plate 76 has a plain straight outer edge 83 throughout a portion of its length and then an inclined or cam edge 84 leading to the shoulder 73, which stands at right angles to the base plate 76 and is, at the proper time, engaged by the latch-bar 60 carried by the door for loclzin the door closed and the latch-bar 59 securec in the shaft against the outer recessed end of the bar 75, as shown in Fig. 6. The plates or arms 78 incline outwardly from the base-plate 76, as shown in Fig. 8, and the said plates or arms 7 S are on the closingmoven'ient of the door 534i acted on by the latch-bar 60 to more the armature or latch-bar 59 from the recess d6 of the rotary member 45 and from the electro-magnets ill so that the said member 45 may become free and the car be permitted to move. During the closing movement of the shaft door, the latch-bar 60 continues its sliding: movement against the plates or arms 78 until said latclrbar 66 is, at its middle portion, permitted to spring behind the shoulder 73 or from the position shown in Fig. 8 to that lustrated in Fig. 6, at which time said latch-bar. 60, being engaged by said shoulder 73, will lock the door 34 against opening movement, andat the same time said latchbar 60 will serve to lock or retain the arma-v ture or latch-bar 59 in its inoperative position free of the electro-magnets 40 and rotary member 45, as shown in Fig. 6.

The operation of the features of my invention hereinbeforedescribed with respect to Figs. 1 to 8 inclusive, will largely be understood from the description hereinbefore presented. VVhen the car is in motion or in use, the shaft door 34 will, by means of the latch-bar 60 and shoulder 73 of the bar 7 5 be held or locked in .closed position, these locking devices being at the shaft-side ofthe door. hen the car is in motion and,

for illustration, passing by a floor 82 ofthe building, the door locking mechanism will remain. unaffected and said mechanism, and the mechanism carried by the car, will then be in the position in which said mechanisms are illustrated in Figs. 5 and 6. \Vhem'how ever, the car is arrested by the movement of the control-lever 57' at a floor 32 of the building, the movement of said lever 57, cutting off the power also operates through the cable 56 and pulley-wheel 42 to rotate the member 45 from the positionin which. said member is shown in Fig. 6 to that in which it is shown in Fig. 8, said member 45 then carrying its recess 46 in line with the armature or latch-bar '59 and its conductor 50 in engagement with both of the contact springs 52, 53. Uponthe engagement of the contact member or conductor 50 with the contact springs 52, 58, the circuit through the electro-magnets will be completed and said magnets become energized. the magnetic action iirst freeing the latch bar from the shoulder 73 so that the door may be slid toward open position, said latch bar 60 being carried away from the plates or arms 78 in opposition to the action of the spring 74 and freeing the armature 6r latchbar 59, which will be promptly, by themagn'etic 'action, caused to enter therecess 46 of the member 45 and loclr 'saidgme'mber 45 against rotation. When the member 45 is locked against rotation, the car cannot be set in motion,'and hence when the door 34 is away from its closed position with the car at the floor of the building at which'said door is located, the car itself becomes locked in stationary position, whereby there is avoided the danger of accident to persons desiring to leave or enter the car, as well as other accidents too common at the present day to require ii'ientioning. The car is loeked stationary when the elevator shaft door 34 is free to be opened or closed. When it is desired to move the car, the elevator shaft door 34 is slid to its closed position, and in this movement of the door to its closed position, it forces the latch-bar 60 against the plates or arms 78 and thereby with the car standing at a floor of the building and the magnets 40 still energized the magnetic field of these magnets will prevent the latch bar 60 from being moved behind the shoulder 73 under the force of.

the spring74, and, should the occasionarise for so doing, the attendant on the car may,

at this time, open and close the door 84 repeatedly, no harm being occasioned thereby since the car is stationary, with its motive power cut off. After the elevator shaft door 34has been closed, the attendant on the car may set the car in motion by the movement of the control-lever 57, as usual, the movement of said lever at such time acting through the cable 56 to turn the rotary member 45 to carry the conductor 50 from engagement with the spring contacts 52, 53 and thereby breaking the circuit through the battery and electro-magnets, which, of course, becomes deenergized; and at this time, the latch-bar 60 becomes freed from the magnetic field of i'nagnets 40, either by the deen'ergizing of said magnets or by said magnets being carried by the car from the immediate neighborhood of said latch-bar, as the case may be, and said bar 60 will under the force of the spring "74, be closed in behind the shoulder 73, or to the position shown in Fig. 5, and lock the door 84 in closed position. The rotary member 45 may be turned either clock-wise or counter clockwise by means of the cable 56 in accordance with the direction of travel of the elevator car, the recess 46 of said member 45at one time being carried to the upper side of the latch-bar or armature 59 and at another time to the lower side of said bar 59. The strip of insulating material 48 is of sufficient length to keep the rotary member 45 out of the electric circuit in both directions of movement of said member, the circuit not being completed through the member 45 and only through the conductor 50, ,when said member 45 is turned to position to cooperate with the armature or latch bar 59.

In Figs. 9 and 10 I illustrate a slightly modified arrangement of the mechanism carried by the car, this modification residing mainly in combining with my mechanism hereinbefore described, means for cooperating with elevator electric control devices. All of the mechanism which are hereinbefore described as applied to the car, the elevatorshaft door and the wall of the elevator-shaft are utilized in the construction I present in Figs. 9 and 10, and hence these features shown in Figs. 9 and 10 will. be numbered correspondingly with the like features shown in Figs. 1 to 8 inclusive, without repeating, unnecessarily, the description thereof. In Figs. 9 and 10 I illustrate the frame 38 as having interposed between its leg members, a switch-box 85 carrying binding posts 86 to which the main circuit wires 87 for the operation of the elevator lead, and within the box 85 I mount a contact plate 88 on a stem 89 equipped with a spring 90 adapted to press th plate 88 toward the binding posts 86 for completing the circuit. The plate 88 remains in contact with the binding posts 86 to maintain the circuit whenever the control lever 91 is set to establish the movement of the elevator-ca1n When the control-lever 91 is moved to neutral and the member 15 of my mechanism has been moved to establish a circuit through the electromagnets a0 and the elevator-shaft door has been started on its opening movement, the armature latclrbar 59 passing into the recess 16 of the member 15 will engage the pin 89 and through said pin force the plate 88' away from engagement with the binding posts 86, thus breaking the main electric circuit. After the elevator-shaft door has been closed and the armature or latch-bar 59 has receded to its inoperative or initial position against the bar 7 5, the spring 90 will reestablish the circuit through the binding posts 86 and on the movement of the control lever 91 permit the car to be moved, the elevator shaft door being then looked in its closed position.

In Figs. 11 and 12 I illustrate a portion of my invention applied to a dumb-waiter shaft car or hoist and door, and in Figs. 11 and 12, 91 denotes the dumb-waiter shaft, 92 the car or hoist therein and 93 the door at a floor of the building leading to said shaft, said door being hinged at 9 1 and having a latch 95 of the usual type. I mount on the car or hoist 92 an electro-magnet 96 to be energized from any suitable source, by means of a puslrbutton or otherwise, the push-button (not shown) being located in the basement of the building or provided at each floor of the building, as may be found convenient. In the dumb-waiter shaft at each floor of the building will be mounted a pivoted lever 97 having an armature 98 a its free end to be attracted by the electromagnet 96 and at its other end being connected. with a latch-bolt 99 mounted in a casing 100 and having its beveled outer end 101 adapted to a keeper 102 located in the edge of the door 93. as shown in Fig. 12. A spring 103 serves to press the free end 1.01 of the bolt into the keeper 102, and the force of this spring must be overcome by the action of the magnet 96 on the armature 98 when the car or hoist 92 comes torest at a floor of the building. When the car or hoist 92 comes to rest at a floor of the building and the magnet 96 draws the armature 98 to it so as to cause the other end of the lever 97 to retract the latch-bolt 99, the person within the room may, by manipulating the ordinary latch 95, open the door 93 and either remove articles from the car or hoist 92 or place articles thereon. It is desirable that the car or hoist 92 should be held in stationary position while the door 93 is open, and hence I provide on the door 93 an arm 104: which swings into the shaft 91 and into the path of the car 92 when the door 93 is opened, as indicated by dotted lines in Fig. 11, said arm 104 serving to lock the car or hoist 92 stationary. When the door 93 is closed, the arm 104 becomes freed from the car or hoist 92 and the latch bolt 99 may reengage the keeper 102 and the door 93 thus becomes locked. The energizing current may be cut off from the electro-magnet 96 in any of the usual ways so as to free the armature 98. I may provide a key slot 105 for a key to operate the bolt 99 from the room side of the door 93, should occasion render that course desirable, so that the door 93 may be opened should accident happen to the electro-magnet 96 or the circuit devices.

In Figs. 13 to 16 inclusive I illustrate my invention in mechanism which comprises a permanent magnet instead of the electromagnet or magnets disclosed in the constructions presented in Figs. 1 to 12 inclusive, and in the particular embodiment illustrated in Figs. 13 to 16 inclusive I show my invention as applied to the lower section of a well known type of vertically sliding door usually composed of two sections adapted to separate at adjoining edges and move to open position by the sliding downwardly of the lower section and upwardly of the upper section of the door. I show my invention in this instance as applied to a vertically sliding door merely as a means of indicating the applicability of the invention to doors of various kinds.

Referring to Figs. 13 to 16 inclusive 106 denotes the lower section of the door and 107 the upper section thereof. said sections being capable of moving vertically in opposing directions from and toward each other, as usual, and intended to be locked together when in closed position by a latch 108. i The elevator car is indicated at 109. and the elevator shaft I indicate at the numeral 110.

The mechanism carried by the car is more clearly shown in Figs. 14 and 15 and comprises a supporting frame 1.11 which is secured to the car and has mounted therein a transverse shaft 112 on which is mounted the two legs of a permanent magnet 113, a rotary locking disk 114 and an emergency cam disk 115. The disk 114 is secured to one leg of the magnet 113'by rivets or bolts 116 so that said disk and said magnet have simultaneous movement on the shaft 112. The disk 114 is formed with a locking recess 117 (Fig. 15) corresponding with the locking recess 46 shown in Fig. 4. The magnet 113 will be connected by a rod 118 to the control lever of the elevator car so that when the car is in motion said lever then being in its operative position will, through the rod 118, hold the magnet 113 and locking disk 114 in their inoperative position represented in Fig. 15, the magnetic field being at such time placed out of action and the recess 117 of the disk 114 being so positioned as not to be capable of receiving the latch-bar or armature 119 intended to enter said recess when the car comes to rest at the floor of the building. When the car is brought to rest at the floor of the building, the magnet 113 is turned to a substantially horizontal position and the recess 117 of the disk 114 is carried toward the adjacent wall of the shaft and receives the locking bar 119 after the door-latch has been released, due to magnetic action, and releases said bar. The bar 119 is mounted in or about the ele vator shaft and it can only move to enter the recess 117 or to the position shown in Fig. 16 after the magnet 113 has acted to release the latch-mechanism connected with the door and which normally acts to lock the door in closed, position until the car has come to rest at the floor of the building and it is desired that the door be opened. The cam 115 is an emergency cam and provided for the same purpose that the cam 44 is supplied in the construction shown in Figs. 1 to 8 inclusive. The cam 115 has an operating rod 120 secured to it and it may be operated from the car so as to turn the cam 115 to a position in which it may force the latch-bar 119 from the recess 117 of the disk 114 whenever an emergency may arise requiring the putting into use of said cam.

The mechanism connected with the door or door-section 106 comprises a plate 121 which is connected by a spring hinge 122 with a plate 123 fastened to a hanger or bracket-plate .124 which is secured directly to the door 106. The plate 121 carries an armature 125, and this armature is in the form of a bar and carries at its outer side a dog or bolt 126 which extends through the hinged plate 121 and rigid plate 124, and when in its operative position said dog or bolt 126 lies above a stop 127, as shown in Fig. 14, and serves as a lock to prevent the opening of the door, it being obvious that the door 106 could not be moved downwardly while the dog or bolt 126 carried thereby is engaged with the upper end of the stop 127. The mechanism carried by the door therefore mainly consists of the hinged or movable plate 121 carrying the armature 125 and dog or bolt 126.

The mechanism secured in or about the elevator shaft comprises the locking bar 119 having laterally extending arms 128 to which are pivotally connected end portions of the respective links 129, 130 which are pivotally secured by pins 131 to a supporting plate or frame 132 of any suitable construction. The link 129 has an upper cam shaped end 133 and at its lower end is integral or rigid with an arm or dog 134. The cam 133 is utilized, when necessary, to aid in pressing the bar 119 into the recess 117 of the disk 114, and the arm 134 is utilized when the door 106 is moving to closed position to be engaged by a part of the bracket arm 124 carried thereby and turned upwardly from the positionin which said arm 134 is shown in Fig. 16 to that in which it is shown in Fig. 14, this movement of the arm 134 serving to turn the link. 129 upwardly and to elevate the latch-bar 119, said bar being thus withdrawn from the locking disk 114 and freeing the car so that, upon power being applied to the same, said car may move either upwardly or downwardly. The parts carried by the door 106 thus comprise the plate or bracket 124, hinged plate 121, armature 125 and dog or bolt 126, and the parts located and secured in or about the elevator shaft consist of the frame 132, latch-bar 119, stop 127, links 129, 1.30, cam 133 and lever arm 134, the cam 133 not being absolutely necessary, but serving as an auxiliary to assure the movement of the latch-bar 119 toward the locking disk 114 or to its operative position.

In the construction shown in Figs. 13 to 16 inclusive there is a door-locking latch represented by the spring-hinged plate 121. armature 125 and dog or bolt 126 connected with the door, and there is in the shaft a car-locking bar 119 to be freed on the unlatching of the door to engage and interlock with a part permanently connected with the elevator car, and there is a magnet connected with the car for moving the doorlatch to free the door and release the bar 119 and a locking disk to receive or become interlocked with said locking bar 119 when freed on the unlatching of the elevator shaft door. The mechanism shown in Figs. 13 to 16 inclusive embody the main principles of operation permitted by the mechanism shown in Figs. 1 to 3 inclusive, but employ apermanent magnet which is movable instead of a stationary electromagnet, and is arranged, in the construction shown, for cooperation with a vertically slidingdoor.

in Figs. 17 to 20 inclusive I illustrate my invention as embodied in mechanism adapted for elevator shafts and cars and hinged shaft-doors provided with an ordinary latch by means of which, when permitted so to do, the attendant on the car may open the door. The construction shown in Fins. 17 to 20 inclusive represents a further embodiment of the invention and an indication of the wide applicability of the invention to varying situations.

Referring to Figs. 17 to 20, 14.1! denotes an elevator shaft, 1-11 at car in sa..-d shaft and 1 12 a hinged shat't door having an ordinary latch bolt 143 to be operated from a knob or the like 1 14-, said latch-bolt serving to lock the free edge of the door in closed position and to be retracted from its keeper 1425 by the rotation of the knob 1 1% when it is desired that the door 142 shall be opened. In the construction shown in Figs. 17 to 20 inclusive I employ three sets or mechanism, as in my hereinbet'ore described constructions, one set of the mechanism being car ried by the door, one being secured in the shaft and one carried by the car.

The mechanism carried by the car is shown in elevation in Fig. 17 and comprises practically the same mechanism shown as carried by the *ar in Fig. 3. T will therefore only briefly describe the mechanism shown in Fig. 17, carried by the car, and, in Fig. 17, 1 16 denotes a suitable enclosing casing secured on the car, 1&7 a horse-shoe shaped frame,148 electro-magnets on the legs of said frame, 149 a shaft mounted transversely between said magnets, 150 a bracket supporting said shaft, 151 a rotary diskdike locking member having a recess in its periphery, and an emergency cam member, said members 151, 153 corresponding substantially with the members 15, 11-. shown in Fig. The electro-magnets 1 18 will, at the proper time, be energized on the movement of the control-lever 15a as is the case with the construction shown in Figs. 1 and 3 and by the means hereinbe'fore explained with reference to Fig. 1, or said electro magnets 148 may be energized by any other suitable means. The locking member 151 is connected by a rod 155 with the controllever 1.54:, and hence said member 151 may be turned in one direction or the other, as may be required, or may be moved to a neutral position with its recess 152 in operative position. as shown in Fig. 18. The emergency cam member 153 is employed tor the same purpose as the cam member at of 3 and it may be actuated through a rod 156 connected with it and with an operating handle 157 mounted on the car. the features for actuating the emergency cam member 153 differing in detail only from the corresponding mechanism shown in Fig. 1 for the cam-member n. It will be observed therefore that the mechanism shown in Fig. 17 as carried by the car diflers only in im material respects from that illustrated. in Fig. 3 as carried by the car.

The mechanism carried by the door 142 resides in a box or locking member 158,this box facing the elevator shaft and having in it a slot 159.

Upon a portion of the elevator shaft and particularly about the door-way for the door 1&2, is pivotally secured, on a screw 160 or otherwise, a triangularly-shaped plate 161 having a latch-arm 162 and an armature or lockingarm 163. The plate 161 is weighted, as at 16%, for normally turning the arm 162 downwardly and the arm 163 inwardly or in a direction toward the door 142. The arm 162 has a latch-head 165 which is adapted to pass through the slot 159 in the box 158 when the door 142 is moved to closed position, and said head 165 being of hook character, is adapted to interlock with said box 158 at the lower end of the slot 159 so as to latch the door in closed position, as shown in Fig. 17. The weight 16 1 causes the automatic movement of the head 165 to its locking position when the door 142 is closed. When the door 112 is open, the arm 162 of the plate 161 may rest upon the pin 166. The arm 163 0]": the plate 161 has a bar-portion or armature 167 to be attracted by the electro-magnets 1 18 for tilting the plate 161 to free the head 165 from the box 158 and permit the door to be opened with the use of the knob 14A.

The mechanism secured in the elevator shaft or to the portion connected with the wall thereof, as an angle-plate 168 of wood or other suitable material, consists of the aforesaid plate 161, a double-ended lever 169, an arm 170 secured to the lower end of said lever and having a head 171 adapted to en gage the box 158, a link 172 connected with the upper end of said lever 169 and a plate 17 3 to which said link 172 is connected and which is connected by a hinge 174 with a plate or leaf 175 secured to said angle-plate 168. There are two plates connected with the hinge 174, one being the aforesaid plate 173 and the other a plate parallel therewith and numbered 176 (Fig. 19). The plates 173, 176 are adapted to have a hinged movement, on the hinge 174;, and carry at their free ends an armature or latch-bar 177, which is adapted to enter the recess 152 in the locking member 151, in the same manner that the locking bar 59 of Fig. 8 is adapted to enter the recess 46 of the rotary member 4C5, and for the same purpose. The outward movement of the plates 173, 176 may be controlled by adjusting screws 178 (Fig. 19). The lever 169 is pivoted at about its middle portion on a screw 189, and the arm 17 0 and link 17 2 have reverse movements imparted to them from said lever 169. In Fig. 17 1 illustrate all of the parts of the mechanism in a normal inoperated position, the door 142 being shown as locked closed by the arm 162 of the plate 161, and the looking bar 177 being set back from the recess 152 of the rotary member 151.

When the car is in motion or at rest away from a floor of the building, the parts of the mechanism will bear the relation. in which they are shown in Fig- 17, but when the car is to be arrested opposite to the door 142 and it is desired that said door shall be opened, the control-lever 154 is moved to neutral position in arresting the car, and this has the effect of turning the locking member 151 to carry its recess 152 to the position in which said recess is shown in Fig. 18,and at this time the electro-magnets 148 become energized and the first action is, by the magnetic force, to act against the bar portion 167 of the plate 161 and turn said plate toward the car and thereby elevate the head 165 of said plate into register with the slot 159 in the box 158; this leaves the door 142 free to be nnlatched by the knob 144 and pushed open. It is desirable, however, that the car be locked in stationary position while the door 142 is'open, and this result is accomplished from the fact that the electromagnets 148 draw the armature locking bar 177 into the 'recess 152 of the rotary locking member 151, the interlock ing of said .bar with said member serving to prevent movement v of the car either upwardly or downwardly. The attraction of the bar 177 to the recess 152 by the eleotro-magnets 148 is permitted bythe release of the box 158 from the arm 170 due to the opening of the door and results in the upper end of the lever 169 being pulled in a direction toward the car and in the arm 170 connected with said lever being pushed outwardly toward the box 158, said pressure tending to open the door 142as soon as the latch bolt 143 has been released by the action of the knob 144. When it is desired to close the door 142 and again establish the car in motion. said door will be manually closed and in being closed the box 158 will be carried against and receive the head 165 on the arm 1620f the plate 161 and become locked or latched thereto, and said door 142 on its closing movement will also carry the box 158 against the head 171 on the arm 170 and turn the lower end of the lever 169 towardthe car and the upper end of said lever 0utv wardly or toward the door, and this will have the effect, through the link 17 2, of turning the plates '17 3, 176 in a direction from the car and in causing said plates to withdraw the locking bar 177 from the recess 152 of the member 151, the car becoming thereby released to move either upwardly-or downwardly. In the event of any unforeseen circumstance requiring the 7 locking bar or armature 177 to become released from the locking member 151 by means other than those actuated on theclosing of the door 142,

such result maybe acomplished by the cam whole, by the number 202, and the mechanism secured in the shaft I number as a whole 203, and refer to Figs. 1 to 8 inclusive for a detailed explanation of these mechanisms. In Fig. 1 I illustrate the elevator shaft as having a single sliding door, whereas in Fig. 21 I show the mechanism in use in connect-ion with a pair of sliding doors, the mechanism on the door being connected with the lower inner corner thereof.

In Fig. 22 I illustrate themechanism as applied in a different position on a pair of slidingdoors 204,205, this mechanism bein I the same as that illustrated in Fig. 21, with the mechanism connected with the door and numbered generally 206, shown as located at the upper inner corner of the door 205, while the mechanism secured in the shaft is num-' bered as a whole 207.

In Fig. 23 I illustrate my invention as applied to a rolling or shutter door numbered 208. The mechanism illustrated}asapplied to the door 208 corresponds with the mechanism hereinbefore described with respect. to 13 to 16 inclusive, The mechanism directly connected with the door208 is the same as that connected with the lower section 106 of the'door shown in Fig. 13, ex-

ceptas to an immaterial difference in the shape of thebraclretarm which supports said mechanism and which mechanism, in Fig. 23, I number generally 209. The mechanism 209 will be employed in connection with the permanent magnet and other details presented in Figs. 14 and 15.

I have hereinbefore described several embodiments of my inventionand they have many corresponding principles of operation not necessary to redescribe in detail. In each preferred instance there is a latching mechanism connected with the elevator shaft door, a car locking mechanism secured in or about the elevator shaft and in cooperative relation to Said latching mechanism and mechanisinconne'cted withthe car for freeing the doorlatch and actuating and cooperating with the said car locking mechanism, sothat when the. car'is arrested at a floor of the building and the door latching mechanism is released'and the door opened or startedto It is an important feature of my invention I that provide magnetic force for freeing the door-latch and for engaging the lock 9; devices in the shaft with the cooperative locking devices on the car for locking the mo tive control lever or other substitute device carried by the car against movement until the shaft door has been closed; and it important that the operator on the car has no duties to perform with my inventon present than he would have in its absence, since his manipulation of the usual control lever in th customary way resu ts at the same time in the features of my invention performing their important duties.

T he rotary locking member need not be a complete disk, as I show it, butit is advantageous that said member have curved or are faces adjacent to the recess to therein, since said faces will aid in directing the latch ba 59 into said recess should the magnetic force draw said her against'said disk before the recess 46 is in accurate position to directly receive it.

I have hereinbefore, a number of times, referred to the car as being looked against movement with the use of my invention, and generally these expressions should be understood to mean that the car becomes locked stationary by the locking of the motive control devices carried by the car against operation tending to set the car in motion,

such being the preferred construction and method of operation. I may. however. look some types of cars by mechanical means engaged with or moving into the path of the car or hoist, as indicated in Figs. 11 and 12, the magnetic force being employed in cooperative relation with a latch normally locking the door closed.

In its preferred form, however, my invention provides magnetic force for freeing the door-latch to permit the opening of the door and to engage the shaft mechanism with mechanism on the car for locking the motive control devices on the car and thereforce being generated or operatively positioned automatically by the movement said control devices to stop the car, and in such form of my invention said shaft mechanlsm is automatically freed from said. mechby locking the car stationary, said magnetic anism on the car on the closing and latching of the door, leaving said control devices free to be manipulated in the usual way.

lVhat I claim as my invention and desire to secure by Letters-Patent, is:

1. In safety appliances for elevator shaft doors, elevator cars and elevator shafts, a latch for the door, magnetic means on the car for freeing said latch, motive control means on the car, and cooperative locking means on the car and in the shaft respectively for locking the said control means while the shaft door is open and rendered operative on and by the opening movement of said door.

2. In safety appliances for elevator shaft doors, elevator cars and elevator shafts, a latch for the door, motive control means on the car, magnetic means on the car for freeing said latch and rendered operable on the movement of said control means to arrest the car, a locking bar in the shaft, and means on the car to interlock with said bar for locking the said control meanswhile the shaft door is open, said bar being exposed to the magnetic force and acted on thereby.

3. In safety appliances for elevator shaft doors, elevator cars and elevator shafts, a latch for the door, a locking bar in the shaft normally held in inoperative position by said latch, motive control means on the car, magnetic means on the car rendered operable on the movement of said control means to arrest the car, for freeing said latch and acting on said bar, and means on the car to interlock with said bar when the bar is drawn thereto by the magnetic force, whereby said control means becomes locked.

4. In safety appliances for elevator shaft doors, elevator cars and elevator shafts, a latch for the door, a locking bar in the shaft normally held in inoperative position by said latch, motive control means on the car, magnetic means on the car rendered operable on the movement of said control means to arrest the car, for freeing said latch and acting on said bar, means on the car to interlock with said bar when the bar is drawn thereto by the magnetic force, and means on the car independent of said motive control means for moving said bar from its inter locking means on the car to permit the car to be set in motion.

' 5. In safety appliances for elevator shaft doors, elevator cars and elevator shafts, a latch for the door, motive control means on the car, magnetic means on the car for freeing said latch and rendered operable on the movement of said control means to arrest the car, a locking bar in the shaft exposed to the magnetic force and locking means on the car connected with said control means to interlock with said bar when the bar is drawn thereto by the magnetic force, for

looking said control means against movement.

6. In safety appliances for elevator shaft doors, elevator cars and elevator shafts, a latch for the door, motive control means on the car, magnetic means on the car for freeing said latch and rendered operable on the movement of said control means to arrest the car, a locking bar in the shaft exposed to the magnetic force and a movable looking member on the car connected with and to be positioned by said control means and having a recess to receive and interlock with said bar, for locking said control means against movement.

7. In safety appliances for elevator shaft doors, elevator cars and elevator shafts, a latch for the door, motive control means on the car, magnetic means on the car for freeing said latch and rendered operable on the movement of said control means to arrest the car, a locking bar in the shaft exposed to the magnetic force and a rotary locking member on the car connected with and to be positioned by said control means and having curved surfaces and a recess intermediate said surfaces and to which they lead, said recess being adapted to receive and interlock with said bar, for locking said control means against movement.

8. In safety appliances for elevator shaft doors, elevator cars and elevator shafts, a hinged bar connected with the door and carrying a latch bar, a shoulder in the shaft to be engaged by said bar for locking the shaft door closed, a hinged bar in the shaft carrying a car locking bar normally held in inoperative position by said latch bar when said door is closed and adapted to be moved to such position on the closing movement of said door, motive control means on the car, magnetic means on the car rendered operable on the movement of said control means to arrest the car. for freeing said latch bar and acting on said locking bar,-and means on the car to receive and interlock with said looking bar, for locking the said control means against movement.

9. In safety appliances for elevator shaft doors, elevator cars and elevator shafts,.a hinged bar connected with the door and carrying a latch bar, a shoulder in the shaft to be engaged by said bar for locking the shaft door closed, a hinged bar in the shaft carrying a car locking bar normally held in inoperative position by said latch bar when said door is closed and adapted to be moved to such position on the closing movement of said door, motive control means on the car, magnetic means on the car rendered operable on the movement of said control means to arrest the car, for freeing said latch bar and acting on said locking bar, and a movable lOCking member on the car connected with and to be positioned by said control means and having a recess to receive and interlock with said locking bar when said bar is drawn rying a car locking bar and engaged by said latch bar for holding said car locking bar in inoperative position when said shaft door is closed and moving the same to such position on the closing movement of said door, motive control means on the car, magnetic means on the car rendered operable on the movement of said control means to arrest the car, for freeing said latch bar and acting on said locking bar, and means on the car connected with said control means to interlocir with said locking bar, for locking said control m ans against movement while the shaft door is open.

11. In safety appliances for elevator shaft doors, elevator car-sand elevator shafts, latching means for the door, car locking means in the shaft, motive control means on the car, magnetic means on the car rendered operative on the movement of said control. means to arrest the car for freeing said latching means and acting on said car locking means, and means on the car cooperative with said control means to interlock with said car'locking means While said door is open, for locking said control means against movement.

12. In safety appliances for elevator shaft doors, elevator cars and elevator shafts, latching means for the door, car locking means in the shaft normally held in inoperative position by said latching means while said door is closed and adapted to be moved to such position thereby on the closing movement of said door, motive control means on the car, magnetic means on the car rendered operative on the movement of said control means to arrest the car for freeing said latching means and acting on said car locking means, and means on the car cooperative with said control means to interlock with said car locking means while said door is open, for locking said control means against movement.

18. In elevator safety appliances, car locking means in the shaft at a floor of the building, motive control means on thecar,

magnetic means on the car rendered opera-- ing means, and means on the car cooperative with said control means to interlock with saidcar ocking means while the shaft door is open, for locking said control means against movement.

14-. In elevator safety appliances, car looking means in the shaft at a floor of the building, means connected with e shaft door for holding said means normally inoperative while the door is closed and returning said means to inoperative position during the closing movement of the door, motive control means on tie car, magnetic means on the car rendered operative on the movement of said control means to arrest the car, for acting on said car locking means, and means on the car cooperative with said control means interlock with said car locking means while the shaft door is o Jen, for locking said control means against movement.

15. In elevator safety appliances, car looking means secured in the shaft at a floor of'the building, motive control means on the car, a magnet mounted on the car and connected with said control means and movable to operative position on the movement of said control means to arrest the car, and means on the car cooperative with said control means to interlock with said locking means when the same is drawn thereto by said magnet, for lockin g said control means against movement.

16. In elevator safety appliances, car looking means secured in the shaft at a floor of the building, motive control means on the car, a magnet mounted on the car and connected with said control means and movable to operative position on the movement of said control means to arrest the car, means on the car cooperative with said control means to interlock with said locking means when the same is drawn thereto by said magnet, for locking said control means against movement, and means for separating the locking means in the shaft from the means on the car to permit the control means to be operated.

17. In elevator safety appliances, a latch for the shaft door, a locking bar in the shaft normally held in inoperative position by said latch, motive control means on the car, a magnet on the car movable to operative position on the movement of said control means to arrestthe car, for freeing said latch and acting on said bar, and means on the car to interlock with said bar when the bar is drawn thereto by the magnetic force, whereby said control means becomes locked.

18. In elevator safety appliances, a latch for the shaft door, a locking bar in the shaft normally held in inoperative position by said latch, motive control means on the car, a magnet on the car movable to operative position on the movement of said control means to arrest the car, for freeing said latch and acting on said bar, means on the ear to interlock with said bar when the bar is drawn thereto by the magnetic force, and means on the car independent of said motive control means for moving said bar from its interlocking means on the car to permit the car to be set in motion. I

Signed at New York city, in the county of New York and State of New York, this 2nd day of December, A. D. 1919.

GUSTAVE G. LAUREYNS. 

